Section 7
Description of the Airplane and Systems
Columbia 400 (LC41-550FG)
RC050002
Initial Issue of Manual: November 10, 2004
7-128
Latest Revision Level/Date: A/12-01-2004
8
– Reduces Contrast and Display Brightness when the respective fields are displayed and
enters the number eight into the Count Down timer. Used in Configuration Mode.
9
– Increases Contrast and Display Brightness when the respective fields are displayed and
enters the number nine into the Count Down timer. Used in Configuration Mode.
Function Displays –
The following functions are shown in the display window.
PRESSURE ALT
– Displays the altitude data supplied to the GTX 327 in feet, hundreds of
feet (i.e., flight level), or meters, depending on configuration.
FLIGHT TIME
– Displays the Flight Time, controlled by the START/STOP and CLR keys
when Flight Timer is configured as manual. Under Automated Airborne Determination
control, the timer begins when liftoff is sensed.
COUNT UP TIMER
– Controlled by START/STOP and CLR keys.
COUNT DOWN TIMER
– Controlled by START/STOP, CLR, and CRSR keys. The initial
Count Down time is entered with the 0 – 9 keys.
CONTRAST
– This page is only displayed if manual contrast mode is selected in
Configuration Mode. The 8 and 9 keys control contrast.
DISPLAY
– This page is only displayed if manual backlighting mode is selected in
Configuration Mode. The 8 and 9 keys control backlighting.
GTX 327 Configuration Mode –
The GTX 327’s configuration is normally set at time of
installation. To view or change any of the GTX 327 configuration parameters, you must access
the GTX 327 Configuration Mode. Use caution when changing configuration. When in doubt,
contact your authorized Garmin Aviation Service Center. Your Garmin dealer can assist in
configuration changes. The Configuration Mode should not be used during flight.
To use the GTX 327 Configuration Mode:
1. Press and hold the FUNC key while powering on the unit using the STBY, ON, or ALT key
(or using the avionics master switch).
2. Press the FUNC key to sequence through the configuration pages. Press the START/STOP
key to sequence in reverse. Reverse sequence stops on the Display Mode page.
3. Use the CRSR key to highlight selectable fields on each page.
4. When a field is highlighted, use the 8 or 9 keys to select changeable fields or the 0 – 9 keys
to enter numeric data.
5. Press the CRSR key to confirm list selections.
Altitude Trend Indicator –
When the PRESSURE ALT page is displayed, an arrow may be
displayed to the right of the altitude, indicating that the altitude is increasing or decreasing. One
of two sizes of arrows may be displayed depending on the rate of climb/descent. The sensitivity
of these arrows is set using the GTX 327 Configuration Mode vertical speed rate.
Timer Operation –
There are several timers that are helpful during the various modes of ground
and flight operations. A discussion of the timers follows.
To operate the Flight timer:
1. Press the FUNC
key until “FLIGHT TIME” is displayed.
2. If the GTX 327 Flight Timer is configured as ACCUMULATE or CLEAR, the timer will
begin automatically when the unit senses that the aircraft has become airborne. The timer
